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Finding the Fourth Proportional to 273.40, 377.30 and 157

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Solution

The fourth proportional to 273.40, 377.30 and 157 is: 216.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.40 : 377.30 = 157 : x
  2. Step 2: Convert to fraction form
    273.40/377.30 = 157/x
  3. Step 3: Cross multiply
    273.40x = 377.30 × 157
  4. Step 4: Simplify right side
    273.40x = 59,236.10
  5. Step 5: Solve for x
    x = 59,236.10/273.40
  6. Step 6: Final answer
    x = 216.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.